Template:Infobox plutonium

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94 neptuniumplutoniumamericium
Sm

Pu

(Uqq)
General
Name, Symbol, Number plutonium, Pu, 94
Chemical series actinides
Group, Period, Block n/a, 7, f
Appearance silvery white
Gloved hands holding a "button" of refined plutonium
Standard atomic weight (244)  g·mol−1
Electron configuration [Rn] 5f6 7s2
Electrons per shell 2, 8, 18, 32, 24, 8, 2
Physical properties
Phase solid
Density (near r.t.) 19.816  g·cm−3
Liquid density at m.p. 16.63  g·cm−3
Melting point 912.5 K
(639.4 °C, 1182.9 °F)
Boiling point 3505 K
(3228 °C, 5842 °F)
Heat of fusion 2.82  kJ·mol−1
Heat of vaporization 333.5  kJ·mol−1
Specific heat capacity (25 °C) 35.5  J·mol−1·K−1
Vapor pressure
P(Pa) 1 10 100 1 k 10 k 100 k
at T(K) 1756 1953 2198 2511 2926 3499
Atomic properties
Crystal structure monoclinic
Oxidation states 6, 5, 4, 3
(amphoteric oxide)
Electronegativity 1.28 (Pauling scale)
Ionization energies 1st: 584.7 kJ/mol
Atomic radius 175pm
Miscellaneous
Magnetic ordering no data
Electrical resistivity (0 °C) 1.460 µΩ·m
Thermal conductivity (300 K) 6.74  W·m−1·K−1
Thermal expansion (25 °C) 46.7  µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 2260 m/s
Young's modulus 96  GPa
Shear modulus 43  GPa
Poisson ratio 0.21
CAS registry number 7440-07-5
Selected isotopes
Main article: Isotopes of infobox plutonium
iso NA half-life DM DE (MeV) DP
238Pu syn 88 y SF - -
α 5.5 234U
239Pu syn 2.41×104 y SF - -
α 5.245 235U
240Pu syn 6.5×103 y SF - -
α 5.256 236U
241Pu syn 14 y β .02078 241Am
SF - -
242Pu syn 3.73×105 y SF - -
α 4.984 238U
244Pu trace 8.08×107 y α 4.666 240U
SF - -
References